Powder constant-volume feeding device.

摘要

A material constant-volume feeding device for feeding a material having a low flowability. It has a hopper having substantially vertical side walls, an inlet and an outlet for storing the material. A comb-shaped obstruction member is mounted to be selectively movable between a closed position and an open position for preventing the material from flowing toward the outlet of the hopper beyond a particular location due to friction between the material and the obstruction member when the latter is in the closed position, and for allowing the material to flow toward the outlet beyond the particular location when the obstruction member is in the open position. A collector member is provided having a horizontal top surface for receiving the material in the hopper. The collector member or the hopper is movable vertically relative to the other between a first position in which the material is prevented from leaking out of the hopper and a second position in which the collector member and the hopper are spaced apart relative to the first position. <IMAGE>